All answers relate to either aquatic or marine animals.
1. Wonderful/amusing (informal or slang) (5)
2. Hope the boat doesn't do this (8)
3. Elongated tea or partially burnt (5)
4. Hard but fragile sun (7,4)
5. Given to fiancee on the big day. (7)
Any assistance anyone can give me would be much appreciated and many thanks to whoever can come up with some answers.