No ocean in this day has completely avoided the effects of human pressure, human pressure takes form in many, direct and indirect ways. Let us see-

1. Overfishing

2. Pollution

3. Introduced species

4. Climate change 

Sustainable Solutions–

Fishing should only be allowed to those with a license and a permit, strict laws should be implied for fishing including a mandatory check of the boats so that no boat exceeds the limit on fishing, the limits and restrictions are as follows-

Artisanal boats- 1,000kg/a day

Medium Sized boats- 5,000kg/a day

Large commercial boats- 10,000kg/a day

This should be implied along with more precise restrictions.

Seasonal and area based restrictions-

Fishing should not be allowed in spawning seasons

No-fishing zones should be implied in habitats of endangered aquatic life 

Gear restrictions-

Prohibit bottom trawling, fish-mesh nets and gillnets (should only be allowed to those with special permits)

Encourage use of selective and focused fishing equipment to prevent and reduce bycatch

There are many ways to prevent pollution, for example-

Conserving water

Shopping wisely

Fishing responsibly

Reduce pollutants

Reduce Waste

Reduce vehicle pollution

Use less energy

Practice Safe boating

Respect habitats

Never release water garden plants, live food (crab, fish etc) or live bait into water bodies, like oceans, rivers, lakes etc. 

Ways to prevent climate change include-

Saving energy at home

Use public transport more often or walk or cycle to short distances

Don’t waste food and only buy what you can use, make compost of the rest

Reduce, reuse, repair and recycle

Use renewable energy (solar panels)

Switch to electric vehicles

Raise awareness 

If you would like to read a much more detailed version of this please let me know in the comments.